2 * Copyright (C) 2015 Google, Inc
3 * Written by Simon Glass <sjg@chromium.org>
4 * Copyright (c) 2016, NVIDIA CORPORATION.
6 * SPDX-License-Identifier: GPL-2.0+
11 #include <clk-uclass.h>
13 #include <dt-structs.h>
16 DECLARE_GLOBAL_DATA_PTR;
18 static inline struct clk_ops *clk_dev_ops(struct udevice *dev)
20 return (struct clk_ops *)dev->driver->ops;
23 #if CONFIG_IS_ENABLED(OF_CONTROL)
24 # if CONFIG_IS_ENABLED(OF_PLATDATA)
25 int clk_get_by_index_platdata(struct udevice *dev, int index,
26 struct phandle_2_cell *cells, struct clk *clk)
32 ret = uclass_get_device(UCLASS_CLK, 0, &clk->dev);
35 clk->id = cells[0].id;
40 static int clk_of_xlate_default(struct clk *clk,
41 struct fdtdec_phandle_args *args)
43 debug("%s(clk=%p)\n", __func__, clk);
45 if (args->args_count > 1) {
46 debug("Invaild args_count: %d\n", args->args_count);
51 clk->id = args->args[0];
58 int clk_get_by_index(struct udevice *dev, int index, struct clk *clk)
61 struct fdtdec_phandle_args args;
62 struct udevice *dev_clk;
65 debug("%s(dev=%p, index=%d, clk=%p)\n", __func__, dev, index, clk);
68 ret = fdtdec_parse_phandle_with_args(gd->fdt_blob, dev->of_offset,
69 "clocks", "#clock-cells", 0, index,
72 debug("%s: fdtdec_parse_phandle_with_args failed: err=%d\n",
77 ret = uclass_get_device_by_of_offset(UCLASS_CLK, args.node, &dev_clk);
79 debug("%s: uclass_get_device_by_of_offset failed: err=%d\n",
83 ops = clk_dev_ops(dev_clk);
86 ret = ops->of_xlate(clk, &args);
88 ret = clk_of_xlate_default(clk, &args);
90 debug("of_xlate() failed: %d\n", ret);
94 return clk_request(dev_clk, clk);
96 # endif /* OF_PLATDATA */
98 int clk_get_by_name(struct udevice *dev, const char *name, struct clk *clk)
102 debug("%s(dev=%p, name=%s, clk=%p)\n", __func__, dev, name, clk);
104 index = fdt_stringlist_search(gd->fdt_blob, dev->of_offset,
105 "clock-names", name);
107 debug("fdt_stringlist_search() failed: %d\n", index);
111 return clk_get_by_index(dev, index, clk);
113 #endif /* OF_CONTROL */
115 int clk_request(struct udevice *dev, struct clk *clk)
117 struct clk_ops *ops = clk_dev_ops(dev);
119 debug("%s(dev=%p, clk=%p)\n", __func__, dev, clk);
126 return ops->request(clk);
129 int clk_free(struct clk *clk)
131 struct clk_ops *ops = clk_dev_ops(clk->dev);
133 debug("%s(clk=%p)\n", __func__, clk);
138 return ops->free(clk);
141 ulong clk_get_rate(struct clk *clk)
143 struct clk_ops *ops = clk_dev_ops(clk->dev);
145 debug("%s(clk=%p)\n", __func__, clk);
150 return ops->get_rate(clk);
153 ulong clk_set_rate(struct clk *clk, ulong rate)
155 struct clk_ops *ops = clk_dev_ops(clk->dev);
157 debug("%s(clk=%p, rate=%lu)\n", __func__, clk, rate);
162 return ops->set_rate(clk, rate);
165 int clk_enable(struct clk *clk)
167 struct clk_ops *ops = clk_dev_ops(clk->dev);
169 debug("%s(clk=%p)\n", __func__, clk);
174 return ops->enable(clk);
177 int clk_disable(struct clk *clk)
179 struct clk_ops *ops = clk_dev_ops(clk->dev);
181 debug("%s(clk=%p)\n", __func__, clk);
186 return ops->disable(clk);
189 UCLASS_DRIVER(clk) = {